NEW Pioneer Power Dura-Ace LEFT ARM ONLY-175mm,9100 Type_Shorts The special layup and shape

The special layup and shape of the Arch CB7 deflects up to 10mm radially to soak up speed-robbing impacts

Kit included 2 ratchets

For use with clamp-on front derailleurs

Barrel: Painted Steel

Molded-in 90deg stop

NEW Pioneer Power Dura-Ace LEFT ARM ONLY-175mm,9100 Type_Shorts The special layup and shapeThe SBT LT91 series of Power Meter Crank arms provide precision single leg power meter measurements for Shimano Dura Ace R9100 crankset owners. Pioneer Power Meter sensor is factory pre installed and precision calibrated on Shimanos Dura Ace R9100 crank arm. Four directional strain gauges and dual accelerometers per arm work together to precisely measure pedaling force, as well as Pioneers proprietary force direction and pedaling efficiency